Electromagnetic vibrator



May 9, 1939. c. BRANDENBURG ELEGTROMAGNETIC VIBRATOR Filed Nov. 29, 1957 A0) www mfr INVENTOR.

ATTQRNEY.

Patented May 9, 1939 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to electro-magnetic vibrators Idesigned for use in treating the human body and tending to act upon the tissues and revitalize the system.

The present invention is an improvement over United States Letters Patent No. 1,167,256, granted to Charlotte Bergman on January 4, 1916, the object being to improve the Vibrator and simplify its construction by the arrangement and addition of certain parts hereinafter set out.

The invention will be clearly understood from a perusal of the following .detailed description, taken in connection with the accompanying drawing, and vin the drawing:

Figure l is a plan view of the vibrator, partly in section.

Figure 2 is a vertical sectional view of Figure l, the view being taken along the line 2--2 of said ligure, and

Figure 3 represents a cross-sectional view of Figure 2, the View being taken along the line 3-3 of Figure 2.

Referring to the drawing in detail, a casing of rectangular form is indicated at I, and this casing is made of suitable lire-proof material or covered with asbestos or other characteristic Inaterial to resist burning an-d for insulating purposes. One end wall of the: casing or housing has an aperture in which a tubular member 2 is secured by a nut 3, whereby wires 4, inserted through the tubular member 2, conduct electric current from a source of electrical supply through the cord 5, to a coil 8. A handle 'I of insulating material is axially bored to receive the tubular member 2, and the handle may have a conventional switch (not shown) of the opposed pushbutton type.

The purpose of the instrument is to provide a means for producing a combined vibratory action, heat and magnetism in treating the tissues an-d nerve system of those to whom the instrument is applied. There is therefore p-rovided the coil 8, consisting of resistance wire as shown, wound on a core 9. The coil 8 has an insulating collar I0 and secured around this collar is a clamp-ing means with a base portion II, formed integrally with the circular portion I2, the ends of the portion I2 projecting outwardly as shown and connected by a bolt and nut I3 and I4 respectively. A strip of metal I5, fastened to an insulating plate I6 by the screws I'I is provided for supporting the coil 8, the strip I5 having an integrally-formed upwardly projecting surface as indicated at |50. upon which the base portion I I of the clamping means rests.

(Cl. 12S- 41) An armature I8 is positioned at one end of the core 9 and the coil 8, the armature being connected to or integrally formed with a metallic strip I9. The strip I9 is bent angularly as shown and one end at is apertured for the insertion of one end of a bolt 2|, riveted or otherwise secured thereto. This bolt is adapted to be moved backwardly or forwardly by a screw driver placed on the head 22 and slides the strip I9 on the plate I6 and a support Ia in adjusting the armature I8 to the core 9 of the coil 8, to regulate the vibrations set up. If preferred the head end of the bolt may take the form of a knurled end for adjusting the bolt by the ngers. The strip I9 which is connected to the armature adapted to be slid as stated and is guide-d in the slot formed by the projection Ia and the top of the plate I6. The plate I6 is fastened to the bottom of the housing or casing I by the screws I'l.

Spaced apart in the walls of the housing I are a plurality of magnets M, the north and south poles of which are oppositely and alternately disposed. The purpose of these magnets is to produce a magnetic eld which is effective several inches beyond the margins of the walls of the housing I.

The instrument, as pointed out, is designed to serve, in addition to the vibratory effect thereof, as a generator of heat and magnetism, and for this purpose and in addition to the magnets M and in order to maintain some of the heat and magnetism, there is provided an interior lining or plate of suitable material as indicated at 25. In the present invention this lining is made in one piece and is angularly formed as at 26 to provide a flange 21, the flange adapted to be seated over and upon the upper edges of the walls of the housing or casing I. This lining eX- tends downwardly against the inside surfaces of the walls of the housing for approximately a distance half way between the top and bottom o-f the housing walls and is secured in position by the pins (or screws) 28. The housing is open at the top, but has a plate 30, with openings 30a, and an angularly formed end 3l, whereby it is fastened to a position slightly below the top edges of the walls by the screws 32. 'I'his plate serves to prevent a too rapid escape of the heat generated by the coil, the heat passing upwardly as indicated by the arrows, Figures 2 and 3, but allowing the heat to escape to an extent sufcient for the purpose, as evidenced by the spacing of the sides and one end thereof from the walls of the housing as at A and B--in addition to the holes 30a.

misi

In the operation of the instrument, its open side is placed towards the parts to be treated, and the beneficial effect attained is brought about by the combined vibratory action, heat and magnetism of the instrument.

Obviously the structure of the instrument may be modified and varied in some respects without departing from the intent of the invention, such as might be said to fall fairly within the scope and meaning of the claims appended hereto.

What is claimed as new is:

l. An electro-magnetic vibrator comprising a housing with an open face, an armature secured inside the housing, a coil co-operating with the armature for effecting vibration of said armature, a plate lining inside the housing for heat holding and retaining purposes, an adjusting means secured to said armature and extending outside one wall of the housing so that the armature can be moved to and from the coil to control the vibrations of the armature, a perforated plate spaced above the said coil as a protection and to 'prevent too rapid escape of heat from said coil, and a handle carrying wires for connecting the coil to an external electrical source.

2. An electro-magnetic vibrator comprising a housing with an open face, an armature secured inside the housing, a coil co-operating with the armature for effecting vibration of said armature, a plate lining inside the housing and extending from the top of the housing to approximately midway toward the bottom thereof for heat holding and retaining purposes, an adjusting means secured to said armature and extending outside one Wall of the housing so that the armature can be moved to and from the coil to control the vibrations of the armature, a perforated plate spaced above the said coil as a protection and to prevent too rapid escape of heat from said coil.

CHARLOTTE BRANDENBURG. 

